diff --git a/Python/graminit.c b/Python/graminit.c
index a001826..14a41d1 100644
--- a/Python/graminit.c
+++ b/Python/graminit.c
@@ -1,3 +1,5 @@
+/* Generated by Parser/pgen */
+
 #include "pgenheaders.h"
 #include "grammar.h"
 static arc arcs_0_0[3] = {